Point of higher priced streamer?

Oh by the way, that Mola Mola Tambaqui DAC you mentioned, has a streamer built in. A network bridge. Hook up Ethernet to it, and you are set! No need for “high priced streamer”. And when you say “the US distributor “ of Mola Mola, you are talking about Bill Parrish? I know the guy. What exactly were you talking about “using your selection of cheaper stuff in audio shows”? I have been in at least two of his Demos, and I know what he is using 

For $100? total you could buy an OTG USB cable, a Nobsound USB to SPDIF/Optical converter and with a 75 Ohm digital or toslink optical cable, plug that into your DAC.
https://www.amazon.com/Douk-Audio-Converter-Interface-PCM192Khz/dp/B085XPRSGM/ref=sr_1_2?dchild=1&am...

That's what I am doing with my Android and Tidal. But I needed to buy UAPP and their Bit Perfect add on app to get TIDAL MQA first unfold.

Does the music sound as good as a Node 2i? Maybe. I don't know about higher priced units like a Cambridge etc.
I've been told that streamers are merely computers. Nothing more.

Sangbro: wonder about your long business trips around Asia (it must be tough having to do a 2-week confinement in a hotel room every time you change country) coupled with a couple of concerts a year in Vienna (how romantic)).
You shops for ‘mid-range’ streamers between 8-30K (what is top of the range then?) using Mola Mola Tambaqui dac whilst not knowing that the Tambaqui has a built in streamer... and ask the classic ‘a bit is a bit, why should I spend more’ questions to get folks excited on audiogon. The whole story seems built on shaky grounds, probably to amuse you whilst listening to music on a basic mp3 setup.

I find Mac book vs streamer very noisy. Music seems to come across much more relaxed more detail and much better soundstage with a dedicated streamer to me.
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Look – this thread is probably largely interesting but not completely helpful to what you are trying to do.  You will not be convinced one way or the other by people stating their opinions between "bits are bits and the rest of charlatans separating fools from their money" and the "every strand from PSU to ethernet plug to digital out makes a huge difference".

This hobby requires work.  Do some listening.  Decide for yourself if (a) you can hear a difference and (b) that difference is worth a delta in spend.

FWIW, I had a Node2, which I used for some time as a streamer to a Chord 2qute (via coax).  Then I bought a used Auralic Aries (the original w/ dual femto and linear power supply – via USB).  I even tried it with a wall wart power supply... and in my experience, I thought I could hear significant differences in all three configs, and in ascending order of preference:

Node 2 -> 2Qute
Aries w/ wall wart -> 2Qute
Aries w/ LPS -> 2Qute

Tangential but slightly related... I even got a fancier USB cable (from Curious USB) last summer, and I think it makes a difference. Which goes against everything I was taught to believe about data transfer, error correction, etc... and I'd like to think as someone who was figuring out SCSI terminations in the 80s, that I've spent some time around data transfer over cables.

I can't promise you'd find the same result, but I definitely felt there were very noticeable sound differences across the three streaming scenarios above.  I can't explain it with sound theoretical reasons (but know others have, frequently related to noise introduced by lower quality power supplies) – and up until doing that work myself, was in the "bits are bits" camp.  In fact, I worked for years a networking company, and am still friends with product managers who design enterprise grade switches... and yet I still heard what I heard.

So do the work of listening to different setups!  Find gear that has money back guarantees and do some listening.  You'll also learn a whole bunch of other things about what you like and don't like as a side benefit, and the more you listen across different combinations of gear, the more you form an opinion of what works for your own tastes (hint: it may not be what measures best or is the darling of one or another forum).

You may even realize that the journey of 'doing the work' is just as, if not more, enjoyable as arriving at some final destination of a finished system :)